Thanks for all your help guys. Managed to up my budget and I've gone with the following:
My basket at Overclockers UK:
- 1 x BenQ EX3501R 35" 3440x1440 VA Curved 100Hz HDR Freesync Gaming Monitor= £638.99
- 1 x EVGA GeForce RTX 2080 XC 8192MB GDDR6 PCI-Express Graphics Card= £719.99
- 1 x Seasonic Focus Plus 750W 80 Plus Gold Modular Power Supply= £104.99
Couple of items on the price match too!